I think bitvest.io as well as 777coin has no license and the license of a gambling site is not too much important as gambler come from many countries where the site is not situated and it is difficult to trace the information provided is correct or not. Also, from many a countries local area can give license which they have no right. One more thing the team of bitcoin is anonymous but we are investing a lot of fund on bitcoin. So, I just want to say that the license is not a big deal.